Final answer:
The specific famous pioneer who was a supply wagon driver during the war is not mentioned, but the provided context details the hardships and experiences of pioneers on the Oregon Trail and related westward movements in American history.
Step-by-step explanation:
The famous pioneer who was a supply wagon driver during the war is not explicitly mentioned in the provided information. However, the context provided illustrates the treacherous journey many pioneers undertook while traveling on the Oregon Trail and other routes like the California and Santa Fe Trails during the westward expansion of the United States. Amid the Civil War, the western regions saw an influx of settlers and soldiers who continued the push for Manifest Destiny, making the movement westward both a perilous and historic endeavor.